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if an AP, if the common difference (d) -4 and the seventh term A7 is 4 then find the first term

Posted by Jatin Mour 7 years, 3 months ago

CBSE > Class 10 > Mathematics

2 answers

Aditya Sahu 7 years, 3 months ago

D = -4 A7 =4 = An An = a+ (n-1)d 4=a+(7-1)-4 4= a+(6)-4 4= a-24 a=4+24 a=28

0Thank You

Diwakar Kumar 7 years, 3 months ago

a1= 28

0Thank You

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CBSE > Class 10 > Mathematics